If they are like the little fellas I just started to see in my cycling tank they actually pulse for forward motion (similar to a jellyfish). The ones I am talking about are very tiny and almost look like a star with tiny flagella. Can someone confirm what these are? Just for my own education...

Thanks,
Pete R.

That sounds like what I have too. Cindy, when I cleaned my filter, it was blocked with all these little creatures, I think a lot of them had died as the water was disgusting.. but like you said, there were certainly a lot still alive in there!